Loading apparatus



Aug. 19, 1930. J. P. DOVEL 1,773,478

LOADING APPARATUS Filed Nov. 14, 1925 lMKJJ OZ JHMES I? DOVEL cinema Patented Aug. 19, 1930 uni rse sures PATENTOFFICE JAMES 2. Dover, or BIRMINGHAMQYALABAMA; Assrenon'ro G. r. ,IDOVEL LOADING APPARATUS Application filed November 14, 1925. Serial No. 6 3,947.

My invention relates to a power loading de vice whichis essentially adapted for the handling of heavy vbulk material such as coal,

ore and'the like, and which is characterized by the provision of a rigid boom adapted to be vertically oscillated and to swing laterally and car'ryingat its free end a loading device somewhat similar in construction to the clamshell dipper butso mounted and designed 1 that it is adapted to dig into the body of material tobe handled responsive'to a down swingofthe boom and thus to take itsload h more efficiently and to operate atmaximumloading capacity. 7

More particularly, my invention contem- 7 plates certain improvements in the type of 1 power shovel forming-the subject matter of Letters Patent No. 1,444,670, which were issued tomeon Feb. 6th, 1923, such improvements consisting essentially in the substitu- "tion of the new type of dipper for the shovel and the arrangement of the dipper jaws so that they are adapted to dig intoithebody.

, of the materialresponsive toa downward swinging motion of the boom, and to assume a position at groundlevel by which one of the jaws can be used'as a scraper to clean up thedfloor like the shovel-inthe patent aforesai invention also comprises the'novel details of construction and arrangements of parts, which have in view the simplification of the mounting and manipulation of the dipper jaws on the boom, and which are hereinafter more particularly described and claimed, reference being had to the' accom "panying drawings which illustrate only the .preferred embodiment of my invent-ion and in which 40 vFig. ,1 is a side, elevation of the complete apparatus with the, dipper shown in full line in its partly open'elevated position, the dotted lines'showing the position the jaws asv sume when fully open and when lowered to as loading. positionl'] V V Fig. 2 is an enlarged plan view of the end a of the boom carrying the dipper. I Fig.8 is a si de elevation of the dipper shown'in its'lowered closed position after taking its load.

Similar reference numerals refer tosim ilar parts throughout the drawings. 0

I have illustrated the invention as mounted upon a wheel supported truck 1 having U thereon a' rollejr' turn buckle table 2 which supports a main power cylinder 3. having mounted thereon overhead guides 4 for the cross head 5, which at each overhung end has swivelled thereto a hinging link 6, each of which in turn is pivotally'connected to the rearend 7 of the side :spaced members of theboom 8, whichmembers are journaled on the outer ends ofa shaft 9mounted in spaced bearing brackets 10 on opposite sides of the center of the turn table. These booms at their '65 free ends have down turned portions 11 and are cross connected at the end ofsaid portions 11 by across brace boltor shaft 12. 2 I

I swing from the'free. end of the'boom a. digging dipper somewhat like a clam shell bucket comprising arfront jaw 14 and a rear jaw 15. The. front jaw has riveted to ,its'

sidesplates 16and these in turn are riveted to brackets 17 which have bearings l8-that are pivotally mounted at each end of the shaft 7 the boom are pivotallyconnected to an eye '20 at the forward end of a piston rod 21 adapted to be operated by a piston recipro-- cable in a' cylin derv 22 mounted by means of trunnions 23, between the boom members 8 and adapted to rockto accommodate itself to i the angular movement of the arms -19. The rear dipper jaw 15 is likewise provided with'side plates 24 and to these'plates are riveted the arms '25'which project vertically and have bearings'26 which are hung from stud bolts l8'mounted in the boom membersS. Each arm 25 is connected by a pair of links 27 to the adj acent lever arm19' near its point of connection to the dipper member 14 and at v a point remote from the pivot 13 for the dipper j aw Inthismanner the two dipperjaw's .are caused to move simultaneously but differmeans of the control valve 29, and the table is caused to rotate by a drive from the motor 30. It is apparent that the motion transmitted by cylinder 22 to the lever arms 11 will be K that of the front dipper jaw 14:. The purpose of thisis to, bring these jaws as nearly as possible to vertical position when the boom is swung down so that their edges will be adapted to dig powerfully downwardly into the body of material to be handled thereby causing the dipper to take its full capacity load and to do this largely responsive to the falling weight of the dipper itself assisted by a power stroke applied through the links 6 from the main cylinder 3 to the boom. In closing the bucket the rear jaw 15 moves in slowly but with great power towards the upper jaw and thus the requisite leverage is available to close the. dipper against very heavy interference. t is also important to note that when the dipper is fully open and dropped to the gr'adelevel, the lower jaw will stand in a scraping position in contact w th the ground while the upper jaw will be raised substantially above the ground level. This is indicated more clearly'by the dotted lines showing the position, of the dipper jaws when lowered in Fig. 1 importance of this feature lies in "the fact that the lower fl p-P j th in. r sit eetq ct ke a shovel or scraper so as to clean the ground and to shovel up material thereon as the ma chinemoves forward, and inthis respect is cap ablje of functioning very much like the shovel-shown in my patent aforesaid but always with the'added advantages that the jaws can be closed to their load and to hold it unt il ready fordischarge'into {tear or elsewhere. The advantage ofhaving the power cylinder 3 acting 'to force the boom downenables me toholdjthe bucket jaws positively against the material while closing them, and I am ableto putthe full weight of the machine on the buckets in this way so as force them to take a full load where very bulky heavyniaterial is to be handled such as muck ore or ma n -si zed or large lumps of limestone. The machine will handle such large bulky material because the lower jaw can be pushed under lar 'e lum and et asufiicient purchase to enable a grip from the upper. jaw to holdthe lump in position between the jaws so that it can be lifted and handled. The control of the apparatus for raising andlowcring the boom and for swinging the boom on the turn table will be well understood by those skilled in the art and need not be. described in detail here.

The apparatus. as a; whole presents a loading device of great simplicity in construction which is rugged and strong and has parts strued that 1 am limited thereto, as changes in arrangement and substitution of equivalents may be made by those skilled in the art without departing from the invention as delined in the appended claims.

Having. thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a. loading apparatus, a rigid swinging boom pivoted thereon free to swing vertically, power means to swing the boom, dipper depending from and directly hinged to thepfree end of the boom, and operating means. for moving the jaws into full' open position and substantially vertical whereby said jaws may be forced downwardly into the material to be loaded by the power actuated down swing of the boom, said operating means comprising a power cylinder mounted on the b oom, and having a piston operated rod operatively connected to one of the dipper jaws, and links connecting the jaws for joint operation responsive to said power cylinder.

2. A. loading apparatus, comprising a rigid boom mounted free to swing vertically, a dipper comprising front and rear aws hinged at difierent points to and dependent from the free end of said boom, a power cylinder mounted on the boom and having a piston rod connected to. one dipper jaw, and links connecting said latter jaw to the other aw.

I 8. A loading apparatus comprising. a rigid boom mounted free to swing vertically, a. dipper comprising front and rear jaws having spaced hinge connections to the free end of said boom, a power cylinder mounted. on the boom and'connected to the outer dipper jaw, and links connecting said jaws. with their point of connection to the inner jaw further from its hinge than the point of connection to the outerjaw. V

4. ins; loading apparatus, a rigid swinging boom pivoted thereon free to swing vert cally, power means to swing the boom, dipper aws depending from and directly hinged to the free end of the boom,operating means lOO 5, In a loading apparatus, a rigid swinging boom pivoted thereon free to swing vertically, power means to swing the boom, dipper jaws hinged to swing from spaced axes mounted directly and transversely in the free end of the boom, and operating means for moving the jaws into full open position and adapted to move the outer jaw sufficiently above the plane of the lower edge of the inner jaw to adapt the latter to serve as a scraper when the apparatus is moved forward with the dipper jaws open and the boom lowered to bring said inner jaw to ground level.

6. In a loading apparatus, a rigid boom, a pair of dipper jaws pivoted to the boom on spaced centers, an operating arm rigidly connected to one of the jaws, a link connection between said operating arm and the other jaw, and power means for actuating the operating arm.

7. In a loading apparatus, a rigid boom, a pair of dipper jaws'pivoted to the boom on spaced centers, an operating arm rigidly connected to one of the jaws, a link connection between said operating arm and the other jaw, and rigid reciprocable poweractuated means for actuating the operating arm.

8. In a loading apparatus, a rigid boom, a I

pair of dipper jaws pivoted to the boom on spaced centers, an operating arm rigidly connected to one ofthe jaws, a link connection between said operating arm and the other jaw, rigid reciprocable power actuated means for actuating the operating arm, and other power means for swinging the boom through a vertical plane.

9. Ina loading apparatus, a rigid boom, a

rear dipper jaw having an upwardly extending'rigid'arm pivotally connected directly to the boom toward the outer end thereof, a

forward dipper jaw pivotally connected di rectly to the end of the boom, an upwardly extending operating arm rigidly connected 7 to the forward dipper, and a link connection between the operating. arm and the upwardly extending arm of the rear dipper aw.

10. In a loading apparatus, a rigidboom,

a rear dipper jaw having an upwardly extending rigid arm pivotally connected directly to the boom toward the outer end there- 7 a of, a'forward dipper jaw pivotally connected 4 directly to the end of the boom, an upwardly extending operating armrigidly connected to the. forward dipper, a link connection between the operating arm and the upwardly I extending arm of the rear dipper, and rigid reciprocable power actuated means for actuating the operating arm.

' In testimony whereof I aflix my signature. r JAMES P. DOVEL. 

